Tyk-On PoC Failed to get certificates

I rebooted the server today, and now I am getting those logs. They happen in my attempt to access the API.
Not sure what is the issue from it. Or how to fix this.
level=error msg="Failed to get certificates: Get http://localhost:8080/tyk/certs/?org_id=5ae0749fe4f72a26e6ac64ff:

Thanks in advance